Estimation of magnitudes from the Palomar Sky Survey prints - Application to quasars

Details Estimation of magnitudes from the Palomar Sky Survey prints - Application to quasars Estimation of magnitudes from the Palomar Sky Survey prints - Application to quasars

Dec 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979mnras.189..853h&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 189, Dec. 1979, p. 853-866.

Astronomy and Astrophysics

Astronomy

26

Quasars, Sky Surveys (Astronomy), Stellar Magnitude, Variable Stars, Astronomical Catalogs, Calibrating, Stellar Luminosity, Ubv Spectra

Scientific paper

The paper discusses in some detail a method of magnitude measurement based on the diameter of QSO images in the Palomar Sky Survey prints. As the main objective is to study QSO magnitudes, the discussion is limited to the O-prints for specified reasons. A suitable calibration sequence is proposed. It is shown that the accuracy of magnitude estimation could be improved to about 0.2 mag by having only a few secondary standards per print. The method is used to study the variability of samples of optically- and radio-selected QSOs.

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